Synthesis, absorption and fluorescence of hydrazone colorants based on pyrrolinone esters
作者:Tarek Aysha、Stanislav Luňák、Antonín Lyčka、Radim Hrdina
DOI:10.1016/j.dyepig.2011.03.013
日期:2011.11
spectroscopy. The absorption spectra are all similar irrespective of substituent and solvent. By comparison the fluorescence is strongly dependent on the electronic character of the substituents. All compounds fluoresce in a low temperature solvent glass and in the solid state and only the 4-cyanophenyl and 4-nitrophenyl derivatives show fluorescence in solution at room temperature. The spectroscopic
通过将一系列电子不同的对位取代苯胺重氮化,然后将这些重氮盐与4,5-二氢-5-氧-2-氧-2-芳基(1H)吡咯-3-羧酸乙酯进行偶氮偶联,制备十种偶氮染料。耦合组件。所有染料均被确认为酮hydr互变异构体,并且被发现为E-和Z-异构体相对于环外C N键的混合物为11 H-NMR光谱。吸收光谱都相似,而与取代基和溶剂无关。相比之下,荧光强烈依赖于取代基的电子特性。所有化合物在低温溶剂玻璃中以固态发出荧光,只有4-氰基苯基和4-硝基苯基衍生物在室温下显示荧光。用激发后E / Z异构化和荧光之间的竞争来解释光谱行为。